I've got one of the Sigelei #8s. I've had it about 2 weeks now I guess and I love it. It feels nice and solid; it is heavier in 18650 mode than my Bolt or my KTS using the same battery. I'm actually using this mod as a vw with the kick and an 18500 battery. I dig that you have options on what battery to use, but I'm not a fan of the life on 18350s so it'd be even better if the shorty mode was for an 18500. I think I spent $50 on mine, and at that price it's a really good deal IMO.